Hay derrick



g- 1941- L G. MESS MAN 2,251,595

HAY DERRICK Filed Jan. 23, 1940 3 Sheets-Sheet l Inventor lea/7 @e Liv/77a MM 19m A tiomeys L. G. MESSMAN 2,251,595

' HAY DERRICK v Filed Jan. 25, 1940 3 Sheets-Sheet 2 N av /Z I I v a? A! I I Z J f J6 r. 2:1 /77 I if J7 if -74 Inventor Zea/7 r lfe ms/War,

/6 4? v 9 By 2mm A iiorneus g- 5, 1941' L. G. MESSMAN 2 251595 HAY DERRICK I Filed Jan. 25, 1940 3 Sheets-Sheet 5 Inventor Attorneys Patented Aug. 5, 1941 HAY DERRICK Leon G. Mcssrnan, Rensselaer, Ind., assignor of one-half to Leonard A. Rajal, Rensselaer, Ind.

Application January 23, 1940, Serial No. 315,233

1 Claim.

This invention appertains to new and useful improvements in material handling and more particularly to a novel derrick or hoist for hay and like material.

The principal object of the present invention is to provide a hay derrick with which hay can be lifted into wagons or to form stacks in a convenient and quick manner.

Another important object of the invention is to provide a hay derrick in which the various parts are positive acting and not susceptible to the ready occurrence of defects.

Still another important object of the invention is to provide a derrick which is power driven, which will require a minimum amount of manual effort.

Other objects and advantages of the invention will become apparent to the reader of the following specification.

In the drawings:

Figure 1 represents a side elevational view of the derrick.

Figure 2 is a front elevational view.

Figure 3 is a rear elevational View of the control means.

Figure 4 is a fragmentary plan view of the drive connection.

Figure 5 is a fragmentary perspective view showing the automatic clutch lever.

Figure 6 is a perspective view of the drum and clutch shaft.

Referring to the drawings, wherein like numerals designate like parts, it can be seen that numeral 5 generally refers to derrick proper, while numeral 6 generally refers to a conventional hay fork of the trip type. This fork 6 includes tines I and a trip mechanism including a trip lever 8 from which a line 9 extends to a point adjacent the operator's seat.

The boom consists of a lower hollow section III and an extensible section II. The upper section II has notches I3 in the lower portion thereof to receive a cross pin I2 disposed through selected openings of the boom section I0 when the lower portion of the section II is disposed in the lower section II). Thus the section I I is adjustable with respect to the section II], and the section In is pivotally connected to the frame or chassis I4 of a tractor generally referred to by numeral I5, as at It.

A U-shaped frame I1 is pivotally connected to the ears I8 on the chassis frame I4 and a U- shaped clamp I9 serves to secure the upper portion of the frame I to the boom section III.

A shaft, generally referred to in Figure 6 by numeral 20, consists of an elongated round shaft portion 2| merging with a square shaft portion 22 which has at its remaining end a pintle extension 23.

This pintle extension 23 is journalled through side portion a. of the frame I'I, while the free end of the portion 2| is journalled through the opposite side portion 17 of the frame I'I. On the square portion 22 of the shaft is slidably disposed a toothed clutch collar 24 which is cooperative with a fixed clutch collar 25 on the adjacent end of a drum 26, onto which is wound a cable 21, this cable representing the lifting cable which extends upwardly and over the pulley 28 mounted at the upper end of a boom section I I. This cable extends downwardly from a pulley 28 and through an elongated slot 29 in an automatic clutch lever 30 to connect to the fork 6 as at 3I I On the fork end portion of the cable 21 is a block 32 which is engageable against the lever 30 to operate the clutch 24 automatically.

The lever 30 is provided with a fork 33 which straddles the upper portion of the boom section II and is pivotally connected thereto as at 34.

Extending downwardly from the intermediate portion of the lever 30 is a control cable 35 which extends to a bell-crank 36 mounted on the upper portion of the frame H. The cable 35 connects to one end of the bell-crank 35 while the other end of the bell-crank 3B is connected by the link 31 to the intermediate portion of a hand lever 38. The lower portion of the hand lever 38, which is pivotally mounted as at 39, is forked as at 40 and adapted to straddle a grooved portion of the clutch section 24.

A compression spring 4| is provided on the squared portion 22 of the shaft 20 between the frame leg a and the clutch section 24.

As shown in Figure 3, a ratchet segment 42a is mounted on a bracket 42 within the frame I1 and is engaged by the latch member 43 which is controlled by a handle 44 on the hand lever 38.

A shaft 45 has its ends journalled through the leg portions ab of the frame I1 and (see Fig. 4) has the bevel gear $6 on its intermediate portion.

A U-shaped frame 41 has bearings 48 through which'the shaft E5 is disposed and a third intermediate bearing 49 through which the stubshaft 50 is journalled, this stub shaft 50 having a bevel gear 5I meshing with a gear 46. A universal joint 52 connects the stub shaft 50 with a drive shaft 53 from the tractor I5.

The drive is from the tractor power take-off shaft 53, by way of the universal connection 52 to the stub shaft 50 and the gears 5| and M1 to the shaft 45. From the shaft 45, the drive is by way of the chain 55 connecting the sprockets on the shafts 45 and 2| to drive the shaft 2| which is connected to the drum 26 by way of the clutch 24-25. Operation of the drum 25 results in lowering or lifting of the cable 21 and the fork 6.

In the event the fork 6 lifts too high, the block 32 will engage the lever 30, pulling upwardly on the cable 35 with the result that the bell-crank 36 will be rocked and will pull the hand lever 38 to the right in Figure 3, resulting in disengagement of the clutch section 24 from the clutch 25, thus removing the power from the drum 26, which will be held by the dog 56 riding the ratchet wheel 5'! on the drum 26. Obviously, the dog 56 can be controlled by the cable 58 which extends to a point adjacent the operators seat (not shown).

While the foregoing specification sets forth the invention in specific terms, it is to be understood that numerous changes in the shape, size and materials may be resorted to Without departing from the spirit and scope of the invention as claimed hereinafter.

Having described the claimed as new is:

A derrick comprising a boom, a material lifter, a drum, a cable extending from the drum to the lifter and extending over the boom, a drive to the drum, a clutch between the drive and the drum, said clutch including a movable clutch element, a rockable hand lever operatively connected with the movable clutch element, a detent for the hand lever, a bell-crank, a connection between the bellcrank and the hand lever, a pivoted and slotted member at the upper end of the boom through which the cable is ridable, a connection between the pivoted member and the bell-crank adapted to operate the bell-crank and release the clutch when the pivoted member is lifted, and an anlargement on the lifter attached cable adjacent the lower end thereof adapted to engage and lift the pivoted member when the lifter approaches the pivoted member.

invention, what is LEON G. MIESSMAN. 

